... CPUs, expansions, various accessories and software, specially designed for GSM/GPRS wireless systems being used for remote measurements, data logging, control ... direct connection of sensors, which lowers the cost of building system. Hence, it can directly work with humidity sensors, water ... Real Time Clock (RTC) at 25 °C:100 hoursØ 2 PWM channels(333Hz) optional Ø Pre-configured standard functions, e. ...